Check cache hits in your logs. You can use Openrouter or pi config to pin providers with best cache hit rates (or disable ones with the worst).

I use Openrouter for everything except Deepseek. For Deepseek I use their API directly.

There is a 3rd party harness specifically tuned for deepseek (reasonix). Have you tried that?

what exactly do they do to "tune" it? It's not Deepseek's official harness, and going direct with deepseek using ur own harness is stupid cheap